feat(linter): implement visitor pattern trait for regex AST

crates/oxc_regular_expression/examples/visitor.rs

@@ -0,0 +1,26 @@
+use oxc_allocator::Allocator;
+use oxc_regular_expression::{
+    visit::{RegexAstKind, Visit},
+    Parser, ParserOptions,
+};
+
+struct TestVisitor;
+
+impl Visit<'_> for TestVisitor {
+    fn enter_node(&mut self, kind: RegexAstKind) {
+        println!("enter_node: {:?}", kind);
+    }
+
+    fn leave_node(&mut self, kind: RegexAstKind) {
+        println!("leave_node: {:?}", kind);
+    }
+}
+
+fn main() {
+    let source_text = r#"/(https?:\/\/github\.com\/(([^\s]+)\/([^\s]+))\/([^\s]+\/)?(issues|pull)\/([0-9]+))|(([^\s]+)\/([^\s]+))?#([1-9][0-9]*)($|[\s\:\;\-\(\=])/"#;
+    let allocator = Allocator::default();
+    let parser = Parser::new(&allocator, source_text, ParserOptions::default());
+    let pattern = parser.parse().unwrap().pattern;
+    let mut visitor = TestVisitor;
+    visitor.visit_pattern(&pattern);
+}

crates/oxc_regular_expression/src/lib.rs

@@ -9,6 +9,7 @@ mod literal_parser;
 mod options;
 mod span;
 mod surrogate_pair;
+pub mod visit;
 
 mod generated {
     mod derive_clone_in;